difficulty用法说明
1.关于是否用作可数名词和是否用复数形式：
(1)表示抽象意义的“困难”，是不可数名词。如：Bad planning will lead to difficulty later.计划不周会给以后带来困难。
(2)表示具体意义的“困难”(如难事、难点、难题等)，是可数名词。如：He paused as if he found a difficulty.他停下来，好像遇到了一个难点。
He met with many difficulties when travelling.他在旅行进遇到过不少伤脑筋的'事。
(3)在某些词组中是不可数名词(只用单数)。如：with difficulty困难地without difficulty容易地
而在某些词组中又是可数名词(且通常要用复数形式)。如：make difficulties刁难under difficulties在困难条件下
(4)在某些词组中可用作可数名词或不可数名词，有时意义相同：make no difficulty＝make no difficulties无异议，不反对
有时意义不同：
be in difficulty有困难be in difficulties手头拮据2.关于句式have difficulty in doingsth：
(1)difficulty通常是不可数名词；
(2)difficulty前可用some,any,no,great,much,little等修饰;
(3)动词have可用find,therebe等换之；
(4)in doing sth中的in可以省略，但不能改为todosth。There was no [little] difficulty in persuading her.没费什么劲就说服她。
I had [found] great difficulty (in) doing the work.做这工作我觉得很吃力。
若其后接名词或代词，也可用介词with。
Doyouhaveanydifficultywith[in]English?你对(学习)英语有困难吗?